Apparatus for controlling the operation of talking machines or machines in timed relation to a cinematographic machine



July 8, 1 24- 1,500,254

F. E. MOSLEY APPARATUS FOR CONTROLLING THE OPERATION OF TALKING MACHINES OH MACHINES IN TIMED RELATION TO A CINEMATOGRAPHIC MACHINE Filed Nov. 29. 1920 AH rqe s Patented July 8, 1924.

UNITED STATES FRANK ERNEST MOSLEY, OF SHETTLESTON, SCOTLAND.

APPARATUS FOR CONTROLLING THE OPERATION OF TALKING MACHINES OR MA- CHINES IN TIMED RELATION TO A GINEMATOGRAPHIG MACHINE.

Application filed November 29, 1920. Serial No. 427,135.

To all whom it may concern.

Be it known that I, FRANK ERNEST Mos- LEY, a subject of the King of the United Kingdom of Great Britain and Ireland, and residing at Shettleston, Glasgow, Scotland, have invented a certain new and useful improvement in apparatus for controllingthe operation of a talking machine or machines in timed relation to a cinematographic machine, of which the following is a specification.

This invention relates to a selector switch which may, for exam le, be driven from a cinematographic mac ine and which is adapted to effect at the required times the starting and stopping of a sound reproducing machine or machines.

Fig. 1 of the accompanying drawing is an axial section and Fig. 2 a transverse section of a switch according to the invention.

Referring to the drawing, 1 denotes a drum of insulating material fitted to a mandrel 2 fixed on a shaft 3 which in practice is operatively connected with the film-feeding spindle of a cinematographic machine.

There is but one possible angular position of the drum 1 relatively to the shaft 3, the drum being secured in driving position by means of the boss 26 fixed on the driving flange 27 and by the nut 28 threaded on a boss 29 of the drunrcarrying mandrel 2 and pressing on the washer 30.

The selector switch proper includes a number of metallic rings 31 held in fixed angular relation to the drum 1 and separated by rings 32 of insulating material; each of the rings 31 presenting on its periphery conducting segments spaced by segments of insulation, the latter being fitted into peripheral notches of the rings 31 and united by annuli of insulation, as shown in Fig. 2.

On the shaft 3 is a return conducting ring 33 interposed between two rings 34, 35 of insulating material.

The rings 31 are electrically connected to terminals 36 on the ring 33. Threaded into each ring 31 is a conducting pin 37 sheathed in a tube 38 of insulating material led parallel to the axis of the shaft 3. The driving flange 27 is formed with pockets, one opposite each pin 37, and in each pocket is received a spring 39 urging a terminal 40 into contact with the head of the pin 37. Each terminal 40 is connected by a cable 11 laced through a rotatable bearing member 42 to the corresponding terminal 36 on the ring 33.

Normally the terminals 40 protrude slightly from the inner face of the driving flange, so that, when the selector switch is slipped on to the mandrel 9 in correct position and the nut 28 tightened up, the electrical connections will be completed without necessity for further manipulation.

I claim A selector switch comprising, in combination, a rotary shaft, a driving flange on said shaft, said flange having pockets, a drum of insulating material adapted to be removably secured to said flange, a plurality of axially separable conducting rings fixed to said drum and cojointly presenting a continuous surface of rotation, each ring comprising, conducting and insulating segments spaced differentially apart, a return ring coaxial with said conducting rings, conducting pins parallel with the axis of the shaft, said pins electrically connected to the several conducting rings and disposed opposite the ockets in said flange, a set of spring-presse terminals in said pockets engageable with said pins, said terminals normally protruding beyond the face of said flange, a set of terminals in the return ring, and electrical connections between said sets of terminals.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK ERNEST MO SLEY.

Witnesses ISABEL RoLLo, FLonENoE HOUSTON. 

